Semileptonic decays of doubly charmed baryons in the bag model
نویسندگان
چکیده
We study the semileptonic decays of $B_{cc}$ ${\rightarrow}$ $B_c\ell^+\nu_\ell$ with bag model, where $\ell$ = $(e, \mu)$, $(\Xi_{cc}^{++}$, $\Xi_{cc}^+$, $\Omega_{cc}^+$), and $ B_c$ are singly charmed baryons $J^P= 1/2^+$. obtain decay widths $\Gamma(\Xi_{cc}^{++}{\rightarrow}\Xi_c^+e^+\nu_e, \Xi_c^{\prime+}e^+\nu_e, \Lambda_c^+e^+\nu_e, \Omega_c^+ e^+\nu_e) =(5.1\pm 0.1 , 11\pm 1, 0.34\pm 0.06, 0.76\pm 0.06)\times 10^{-14}$~GeV, $\Gamma(\Xi_{cc}^+\rightarrow \Xi_c^0e^+\nu_e, \Xi_c^{\prime0}e^+\nu_e \Sigma_c^0e^+\nu_e) (5.1\pm 0.6, 1.5\pm 0.1) \times $\Gamma(\Omega_{cc}^+\rightarrow \Omega_c^0 e^+\nu_e, \Xi_c^0e^+\nu_e \Xi_c^{\prime0} (22\pm 2, 0.32 \pm 0.04, 0.77\pm 10^{-14}$~GeV. also get that $\Gamma$($B_{cc}$ $B_c\mu^+\nu_\mu$)/$\Gamma$($B_{cc}$ $B_ce^+\nu_e$) $0.97\sim 1.00$. In addition, we discuss $SU(3)$ flavor breaking effects, classified into three aspects: phase space differences, spectator quarks, overlappings transited quarks. particular, show effects dominated by which can be as large 25\%. Explicitly, find $\Gamma(\Xi_{cc}^{++} \to \Lambda_c ^+ e^+ \nu _e) V_{cs}^2/\Gamma(\Xi_{cc}^{++} \Xi_c \nu_e )V_{cd}^2 1.24$, is expected $1$ under exact symmetry.
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ژورنال
عنوان ژورنال: Physical review
سال: 2023
ISSN: ['0556-2813', '1538-4497', '1089-490X']
DOI: https://doi.org/10.1103/physrevd.107.053008